Environmentally conscious cat lovers can send as many greeting cards to their cat-loving buddies as they'd like, without worrying about how many trees will be cut down in the process. Tree-Free Greetings makes a wide variety of beautiful feline-themed greeting cards that use paper made from kenaf, an annual crop grown commercially in the United States. The manufacturers say kenaf is a great alternative to trees because it grows much faster and insecticides are not needed to sustain its growth. Choose from a variety elegant cards that feature specific breeds, including the American Curl and the Japanese Bobtail, or a collection of lovable domestic long- and shorthairs. Each card is blank inside and comes with a fully-designed matching envelope.